code: def test_enable_parallel_projection(camera):
      camera.enable_parallel_projection()
      assert camera.GetParallelProjection()
      assert camera.parallel_projection
  
imports: import io
  import numpy
  import pytest
  import pyvista
label_desc: Use image node_id 14 for calling a global function with example usage: test_enable_parallel_projection(camera) without return types